| Yankton to Smolyan | 5,580.03 mi (8,980.19 km) |
| Yankton to Sofia | 5,475.86 mi (8,812.55 km) |
| Yankton to Sopot | 5,524.37 mi (8,890.62 km) |
| Yankton to Sozopol | 5,629.89 mi (9,060.43 km) |
| Yankton to Sredets | 5,618.03 mi (9,041.34 km) |
| Yankton to Stamboliyski | 5,545.11 mi (8,924.00 km) |
| Yankton to Stara Zagora | 5,564.74 mi (8,955.59 km) |
| Yankton to Svilengrad | 5,618.36 mi (9,041.88 km) |
| Yankton to Svishtov | 5,491.43 mi (8,837.60 km) |
| Yankton to Targovishte | 5,549.74 mi (8,931.44 km) |
| Yankton to Teteven | 5,494.60 mi (8,842.71 km) |
| Yankton to Troyan | 5,510.80 mi (8,868.77 km) |
| Yankton to Tryavna | 5,536.57 mi (8,910.24 km) |
| Yankton to Tutrakan | 5,507.26 mi (8,863.08 km) |
| Yankton to Varna | 5,592.57 mi (9,000.36 km) |
